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Dept. 3226, Bureau of Mines
Laramie, WY 82071
Phone: (307) 766-2379
Fax: (307) 766-6729

UW Profiles

Tom Osborne - 1957

Developer of first commercial "shirt pocket" calculator

Tom Osborne is a former meteorologist for the Strategic Air Command, U.S. Air Force. He co-founded Logic Design and designed and constructed the world's first scientific desktop calculator, the "Green Machine," in 1964.

He also developed computer and calculator products in collaboration with Hewlett-Packard, the most famous of which is the HP35, the first commercial "shirt pocket" calculator, in 1972. Both the "Green Machine" and the HP35 are on display at the Smithsonian Institution in Washington, D.C.

Osborne holds more than 60 patents and developed the algorithmic state machine (ASM), a technique for designing digital state machines.

He holds an Master's of Science degree in electrical engineering from the University of California at Berkeley (1962), is a member of Sigma Tau and Phi Kappa Phi honorary fraternities, and is a member of IEEE.

Osborne was inducted into the UW College of Engineering Hall of Fame in 1998.

Photos courtesy of UW Photo Service and American Heritage Center

Thomas Osborne

Tom Osborne
Thomas Osborne went on to earn over 60 patents after graduating from the University of Wyoming. He was inducted into the UW College of Engineering hall of Fame due to his efforts.

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